Cellular form for embedment in concrete construction



Feb. 22, 938, H, MI HADLEY 2,109,009

CELLULAR FORM EOE EMBEDMENT 1N CONCRETE CONSTRUCTION i Filed May 29, 1957 2 sheets-sheet 1 Z NNN@ .59%.

fj'gjz H M. HADLEY Feb. 22, 3938.

CELLULAR FORM FOR EIMBEDMENT 1N CONCRETE CONSTRUCTION Filed May 29, 1957 2 Sheets-Sheet 2 INVENTOR.

ATTORNEYS Patented Feb. 22, 1938 UNITED STATES lPATENT OFFICE CELLULAR FORM FOR EMBEDMENT IN CON- CRETE CONSTRUCTION 21 Claims.

This invention relates to internal forms for concrete to be used in constructing hollow walls and hollow floors in buildings, and various other hollow celled constructions. It has been the practice heretofore to employ internal forms in constructing walls and oors so as to reduce the quantity of concrete employed, and also so as to reduce the dead load of the building.

The general object of the invention is to produce a cellular construction of this type, which will be Very inexpensive as regards the cost of the material employed in the form, and also which can be erected with a minimum of labor.

One of the objects of the invention is to construct the cellular forms in such a way that they may be made to cooperate with reinforcing bars, such as are usually employed in concrete structures.

A further object of the invention is to produce -30 an internal form for concrete, which will be of light weight, but in which its side walls will be so effectively braced and supported from the interior of the cell as to enable them to be of relatively small thickness, thereby contributing to the 25 economy of material in building the forms.

A further object of the invention is to produce a cellular form for concrete walls, so constructed that in building the forms they will cooperate with the vertical reinforcing passing up from the 30 footing in the space where the wall is to be formed.

In practicing the invention, I employ side walls preferably composed of a single sheet of veneer wood, or of thin sheet. metal, or of heavy paper,

35 or of combinations of these materials; and one of the objects of the invention is to provide simple means for maintaining these side walls in position, and for connecting their ends together to complete the cell form and exclude the con- 40 crete from the same.

Another object of the invention is to provide simple and effective means of rigidly connecting the interior transverse diaphragms with the longitudinally extending side stringere, and adjacent 45 these points of connection to provide legs whereby the internal form may be connected to reinforcing bars .exterior thereto, or may otherwise be supported in desired position.

Further objects of the invention will appear 50 hereinafter.

The invention consists in the novel parts and combination of parts to be described hereinafter, all of which contribute to produce an efficient cellular form for embedment in concrete con- 55 struction.

A preferred embodiment of the invention is described in the following specification, while the broad scope of the invention is pointed out in the appended claims.

In the drawings: 5

Fig. l is a vertical section taken through a wall and a floor supported by the wall, with the represented parts partially broken away; this View illustrates cellular forms of my invention embedded in the concrete. l0

Fig.,2 is a horizontal section through the wall shown in Fig. l, about on the line 2-2 of Fig. l, out upon an enlarged scale, the ends of the View being broken away. This view shows a complete wall with cellular forms and reinforcing in place.

Fig. 3 is a perspective illustrating a side Stringer strip or plate of metal, which I may employ at the vertical edges of the cell walls to hold the same in position, and to complete the cell form. The lower portion of this View is broken away. .20

Fig. 4 is a horizontal section through approximately one-half of a cellular form of my invention, and illustrating another embodiment in which the details at the side Stringer of the cell are a modification of the construction shown in Fig. 2.

Fig. 5 is a fragmentary section taken about on the line 5--5 of Fig. 4 upon an enlarged scale, and further illustrating details of the construction illustrated in Fig. 4.

Fig. 6 is a view similar to Fig. 4, but upon a reduced scale and showing the `entire cross-section of the cell except that a portion of the thin veneer side walls are omitted; and this view illustrates another modification of detail at the side stringers of the cell.

Fig. 7 is a plan of a metal .diaphragm plate which may be employed in the construction of the cellular forms, a portion of the view being broken away.

Fig. 8 is a section taken about on the line 8--8 of Fig. 7, and further illustrating details of the diaphragm plate illustrated in Fig. 7. In this view in dotted lines the position of the walls of the cell is indi cated.

Fig. 9 is an end elevation of the side Stringer used with the metal diaphragm plate shown in Fig. 7, and shows how it is shaped at its edges to cooperate with the side walls of the cells to complete the cell form structure.

Fig. l0 is an edge elevation of a flange strip of the type illustrated in Fig. 6, used to cooperate with the wooden side Stringer there employed.

Fig. 11 is a front elevation of two cellular forms set up alongside of each other as they would be in;

forming the wall, and represents a portion of the footing under the same in vertical section. The ends of the cellular forms are broken away. This view particularly illustrates the manner in which diagonal Wiring is employed to connect and rigidly brace the assembly of component parts of the cellular form.

Fig. l2 is a vertical section on the line lf2-l2 of Fig. i.

Fig. i3 is a horizontal section through a cellular form illustrating the use of a wrapping of stiff paper to form the side walls of the cell.

Before proceeding to a more detailed description of the invention, it should be stated that in practicing the invention I provide transverse diaphragm walls or plates for the cellular forms, which are preferably of elongated shape with side edges located at the cell walls, and at these side edges, stringers are provided passing through sockets or notches in the diaphragm plates. The Walls of the cell are secured against the stringers and the side edges of the walls at the ends of the diaphragm plate are preferably bent in, or curved, and at these points I provide longitudinal side stringers or side plates which interlock with the edges of the walls to effect a closure therewith and to completely close the cellular cross-section. The cellular forms are also preferably provided with legs at suitable intervals for supporting same, and to furnish means by which the cellular form may be attached to reinforcing bars if desired, and these legs may be formed as integral extensions from the diaphragm Walls or plates. The side stringers or side plates preferably not only interconnect with the ends of the cell Walls, but also interconnect with the ends of the diaphragm walls so as to hold the same in position.

The diaphragm walls may be made of light thin metal preferably flanged to stiffen them, or they may be made of Wood. If the diaphragm wall is made of metal, the metal is preferably punched to form sockets or openings through the metal sheet to receive the stringers that extend longitudinally with the form. In the case of a wall, `these stringers would be vertical, and in the case of a floor they would extend in a horizontal direction.

Fig. 2- illustrates a construction which is adapted `to be made of metal, excepting the stringers, which are preferably always of wood or similar material.

If the cellular form is constructed with Wooden diaphragm walls, I prefer to employ wooden side stringers for closing the sides of the cells, and in this case I may employ as legs metal bars of any structural shape such as channel-form, which are secured at the sides of the cells and aid in interconnecting the diaphragm walls and the side stringers, and which provide seats for attaching reinforcing rods if desired. This type of construction is shown in Fig. 4. This type of construction may also be modied slightly, as will appear hereinafter.

.T n walls, the cellular forms can be readily set up on properly spaced vertical reinforcing rods that run up from the base of the wall; and in constructing -oors, the cellular forms can readily be supported directly by the legs seated on suitable blocking places upon the bottom form of the iioor, or may be attached to and be supported by connecting them to horizontal reinforcing rods. It is apparent also that the cellular forms may be attached to the reinforcing bars in advance and that then the cell forms and reinforcing bars would be put in place at the same time. This would be particularly advan tageous where several separate and independent cell forms were attached to the same set of reinforcing bars.

In Figs. l and 2 I illustrate an embodiment of the invention in which the cellular forms are built into a wall I, and a floor 2.

In setting up my cellular forms toI construct a wall such as the Wall l, a footing 3 for the Wall should be provided, from which reinforcing rods l extend upwardly. In accordance with my invention, I construct cellular forms cooperating with these vertical reinforcing rods, and preferably forming a continuous hollow space or void extending up from the base or footing 3 to the juncture of the Wall and floor, at which point any type of construction may be employed.

It may be desirable, of course, to have horizontal sections or headers of concrete in the completed wall, in which case short sections of cellular forms having closed ends are attached to the vertical reinforcing bars with proper spaces between them, so that these intervening spaces, becoming filled with concrete, form the desired horizontal headers.

In constructing the cellular forms, I provide a plurality of transverse diaphragm walls, or plates 5. The first one placed rests on, o-r is adjacent to, the footing 3. If these diaphragm walls are made of sheet metal, I prefer to punch a plurality of sockets or openings 6 in the same adjacent the side edges l of the plates, which side edges are preferably convex (see Fig. 2) so that the cells are of reduced thickness toward their ends or vertical edges. As indicated in Fig. 2, the cells 8 are preferably spaced apart so that when the concrete is poured, a web 9 of concrete occurs between the vertical cells, which is monolithic with the inner and outer slabs Il] o-f the Wall. Through the sockets 6 I place a plurality of vertical stringers Il, which are preferably made of light Wood and of relatively small cross-section. The outer faces or edges of these stringers il are located near the side edges of the diaphragm walls, and preferably are located near marginal flanges l2 that I prefer to form on the diaphragm. These marginal flanges are shown clearly in Fig. '7 and Fig. 8, and will be described more fully hereinafter. In Fig. 2 the diaphragms or diaphragm plates are of solid form, but if desired, the central portion of intermediate diaphragms that do not retain concrete may be punched out and flanged as indicated in Fig. 7.

The sockets or openings 6, or notches Where they are employed, are made to have their major dimension approximately normal to the convex sides of the diaphragm so that the stringers Il which pass through them have their sides inclined at varying angles to the vertical and out of parallel to one another. The effect of having the stringers thus pass through the diaphragm Walls 5 at angles inclined to one another gives the cellular form great stiiness in its longitudinal direction and materially strengthens it, since any tendency of the diaphragm plate to tip in a longitudinal direction causes it to bind and tighten against the variously inclined stringers. This is illustrated in Fig. 2 and other figures.

The side wlsA I3 of the forms may consist of thin metal sheets of very small gauge, so that the expense of employing them is small. V These side Walls E3 are placed under or, back of the flanges l2 and then bent into convex shape to conform to the contour of the edges 1' of the diaphragms. "he outermost stringers IIa toward the ends of the diaphragm are preferably a short distance from the vertical sides of the cells, so that the side walls I3l overhang at the vertical sides of the cell, as indicated in Fig. 2.

At intermediate points along the length of the cells, that is, at the ends of the sheets that form the sides of the cells, two diaphragm plates may be used back to back, or if desired, the marginal flanges I2 may be divided into sections, one section being bent in one direction and the adjacent section being bent in the opposite direction.

The cellular form is completed by means of a side Stringer or side plate I4 at each side of the cell structure. One of these side stringers is illustrated in Fig. 3, and consists of a continuous strip, the vertical edges of which are bent and crimped so as to form flanges I5 and I3 adjacent to each other, and forming an elongated socket I'I, or recess into which the ends of the walls I3 t.

The cellular forms; are preferably constructed so that adjacent their vertical sides, seats or rudimentary sockets are provided to receive reinforcing rods Il, when desired. If the diaphragms 5 are of metal, the seats f'or the reinforcing rods 4 are preferably formed integrally with the diaphragm plates. For this purpose at the ends of the diaphragm plates, outwardly projecting extensions I8 are formed, which terminate in rudimentary recesses or seats I9 to receivev the reinforcing rods. In this way the side of each cell may be worked in between two oppositely disposed reinforcing rods d, which cooperate to hold the cell in position. It is not, however, an essential part of the cellular form construction that reinforcing bars be attached to the outwardly projecting extensions I. The reinforcing bars may be omitted and then projecting extensions I8 would serve as seats or points at which the cellular form could be supported or blocked away from the exterior forms of the concrete wall or oor, in which the cellular form is to be embedded.

It is preferable to have an interlocking connection between the side Stringer M and the adjacent end of each diaphragm 5. For this purpose the end of the diaphragm plate may be cut into to form a deep notch 22) (see Fig. 2), and the flanged edges of the side Stringer strip I4 are cut into at opposite points to form slots 2| .(see Fig. 3), the cross-section of the metal at the point 22 between these opposite slots being of substantially the same width as the notch 2li. This enables the side Stringer lil to be applied to the end of the diaphragms 5, as illustrated in Fig. 2, and the edges of the notch 2U at the points 2la prevent the side stringer from shifting laterally; that is to say, from shifting in either direction along the longitudinal axis of the cell.

lIhe extensions or integral ears I8 of the diaphragms 5 are, of course, considerably stiffened by the marginal flange l2, which extends along the edge of the plate at all points except above and below the notches 2B where the flanges of the side plates I5 and I6 ht around the ends of diaphragms 5.

The recesses or seats I9 for the rods Ii, are preferably displaced somewhat inwardly with respect to the plane of the side stringers I4.

It is evident that a floor could be built in the same way as a wall, and this is illustrated in Fig. 1. The section of the floor in the other direction wouldxbe the same as in Fig.V 2, if the figures were turned so as to extend in a horizontal direction. In this way concrete corresponding to the webs 9 would extend as beams or joists between the cells. In floors of considerable extent, it is obvious that the cells could be terminated wherever desired, so as to form intercostal transverse webs in the concrete connecting the joists or beams corresponding to the webs 9.

Where several transverse webs are desired and the cellular forms are not attached to reinforcing bars, it is planned to connect several cellular form units in series in a different manner to permit of easy handling and simultaneous placement. In this case certain of the Stringer members, I I, will be made common to adjacent cellular units and will extend continuously through the concrete of the transverse webs. (See Fig. 12.) By using only the minimum number of such continuous stringers that are required for proper handling and by preferably using alternate stringers and by alternating those used between the top and bottom of the cell form the section of the concrete intercostal transverse webs will not be seriously reduced nor will their strength be seriously impaired. Another way vof stating this construction is to say that there is one cellular unit which is continuousv but that at certain places, between pairs of properly positioned diaphragnis 5 of solid form certain of the stringers Il, the side walls I3, and the side stringers or side plates I4 are eliminated, the continuity of the unit being preserved solely by the remaining stringers. This is illustrated in Fig. 12.`

As the iinal step in holding the component parts: of the cell rigidly together and in fixed relationship with one another, I brace them on both sides by diagonal braces 22 consisting of wire. The ends of these wires 22 are anchored in the extensions I8, or they may be wrapped completely around the cellular form in a diagonal direction, being attached and connected to or anchored by they projecting ears I3, or the legs 3|) or 42. The arrangement of these diagonal braces is illustrated in Fig. l1, which will be described more fully hereinafter. Directly encircling non-diagonal Wires or other banding 22d may likewise be employed. (See Fig. l1.)

Referring to Figs. 4 and 5, I illustrate a construction for the cellular forms in which the diaphragm 5a is formed of wood, in which case the sockets or notches 6a for the stringers I Ib are cut into the opposite edges of the diaphragm. In this construction I may employ a side wall I3a of wood, preferably consisting of a single thickness of Veener wood. At each end the side wall I3a is bent around to produce a curved end 24, the edge 25 of which is tucked into a longitudinal slot 2B that extends along the edge of a side Stringer 21, which side Stringer may be of light and inexpensive wood. Of course, the diaphragm 5a should also be of relatively cheap wood, and need not be of great thickness; for example, three-eighths inch, or one-half inch. It may be formed of 3-ply Veneering.

The end of the diaphragm l5d is preferably interlocked with the side stringer 2l, by cutting a notch 28 into the diaphragm, and by also forming a notch 29 in the inner face of the side Stringer 21.

In this embodiment it is necessary to provide some means for supporting the cellular form in position while it is being embedded in the concrete, and for engaging reinforcing rods if desired, and for this purpose I prefer to provide bars or legs 30 preferably made of light channel iron, which are countersunk in a recess 3| in the outer face of the side stringer 21. The ends of the leg bars 30 are preferably offset inwardly to- Ward the middle of the cell, as indicated in Fig. 4, and terminate in outwardly projecting tongues 33; and at these tongues the flanges of the channel are cut away to form a half round socket or seat 34 for attaching a reinforcing rod, if desired.

If desired, the web 32 may have integral spurs 35 and 36 punched out of it and turned inwardly so that these spurs will lie on opposite faces of the diaphragm a, thereby assisting in holding the same in position. (See Fig. 5.) In putting the bar 30 in position, these spurs can be forced through the thin wall i301., or slots may be formed for them.

The tongues 33, or their junction with the body of the bar 30, may be provided with eyes or small openings 37, to attach the diagonal brace wires 38.

Fig. 6 illustrates a construction similar to that shown in Fig. 4; that is to say, it employs a wooden diaphragm 5b, but the side Stringer 21a itself does not carry sockets for the ends of the walls |31)I formed directly in it. Instead of this, I prefer to employ flange strips 39 of metal, which seat at their back edges against the side faces 46 of the side Stringer 21a. These strips 39 run along continuously, and at the proper intervals have slots 4I cut in them (see Fig. l0) to enable them to seat over the outer side of a channel-form leg bar 42, which is employed at each side of the cellform to interconnect the side Stringer 2'ia with the diaphragm plate 5b. This bar 42 has its web punched out toenable it to fit over the end of the transverse diaphragm 5h, and it forms the connection between the transverse diaphragm 5b and the side Stringer 21a. A slot 43 formed in the end of the side wall |319, permits it to fit around leg 42, and adjacent this point a tongue 44 of metal is struck out from the web of the channel bar and bent aro-und on the outer side of the flange strip 39 and the outer face of the side Stringer 21a.

Furthermore, in order to increase the security of the construction at this point, I may provide the flanges of the channel bar 42 with roughened points or teeth 45 that will dig into the wooden side stringer 21a to hold it in place.

In this construction the end of the web of the channel bar 42 may be bent around to form a seat 46 for attaching a reinforcing rod, if desired. The ends of the flanges of the bar 42 are preferably bent outwardly to form tongues 46a that assist in anchoring the bars in the concrete, and give the bars the effect of front and rear reinforcement through a wall.

In Figs. 7 and 8 I illustrate a diaphragm plate 5c in which the middle portion of the plate is struck out to form an opening through it, and this opening is provided with a marginal flange 41. If desired, when the openings 48 are punched to receive the wooden stringers, the ilange 43 may be formed at each end of the Stringer opening, and these flanges 43 that lie adjacent to the outermost marginal flange 59 of the diaphragm will cooperate with the flange 5l] to hold the wall of the cell in position. In this View a notch 20c is illustrated similar to the notch 2li referred to in connection with Fig. 2. In Fig. 8 the dotted lines represent the side walls l3c of the cell, and illustrate how the same are held in position by the outermost flanges 49 that lie adjacent the stringer openings 48,

In Fig. 11 I illustrate two vertical cellular forms set up alongside of each other, and in this view 5b indicates the diaphragm of the type illustrated in Fig. 6. The ends of these diaphragms, through the medium of the legs 42, are connected by diagonal brace wires 22C, preferably as indicated.

Another construction contemplated would employ a skeleton of diaphragms and stringers, substantially as described, but would eliminate the separate top and bottom sidewalls. In lieu thereof the skeleton frame would be completely wrapped around with a wrapping of heavy Waterproof paper la., the edges of which would overlap and would be gummed or stitched together or would be tacked together by a row of tacks 'lb driven into a Stringer beneath. Encircling wiring or banding, and supporting leg members, all as previously described, would complete the construction. (See Fig. 13.)

In the general case the cellular units will have a length three or four times greater than the major cross-sectional diameter. At the ends the cellular units will be closed by suitable header sections to prevent concrete entering into them.

The reinforcing bars would be attached to the extensions I8 by wiring or other suitable means.

Wire mesh 1c is preferably employed secured to the reinforcing bars in any suitable manner.

It is understood that the embodiment of the invention described herein is only one of the many embodiments this invention may take, and I do not wish to be limited in the practice of the invention, nor in the claims, to the particular embodiment set forth.

What I claim is:

1. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side stringers located at opposite ends of the diaphragm Wall, and means for connecting the side stringers and the diaphragm wall.

2. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side stringers located at opposite ends of the diaphragm wall, means for connecting the side stringers and the diaphragm wall, and means for connecting the side Walls and the side stringers.

3. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side stringers located at opposite ends of the diaphragm wall, means for connecting the side stringers and the diaphragm wall, and projecting leg members adjacent the side stringers rigidly connected to and made a part of the cellular form.

4. In a cellular form for embedment in concrete, the combination of a diaphragmwall, a plurality of stringers extending through said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side stringers located at opposite ends of the diaphragm wall, means for connecting the side stringers and the diaphragm wall, said side stringers being channeled at their edges for engaging the ends of the said side walls.

5. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side Stringers located at opposite ends of the diaphragm Wall, means for connecting the side stringers and the diaphragm wall, said side stringers having flanges for engaging the ends of said side walls.

6. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through Said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side stringers located at opposite ends of the diaphragm wall, means for connecting the side stringers and the diaphragm wall, and projecting leg members adjacent the side stringers rigidly connected to and made a part of the cellular form, Said leg members having means for seating reinforcing bars thereon.

7. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through Said diaphragm wall adjacent the outer periphery thereof, side walls for the cell mounted on the outer faces of said stringers, a pair of side stringers located at opposite ends of the diaphragm wall, means for connecting the side stringers and the diaphragm wall, and projecting leg members adjacent the side stringers rigidly connected to and made a part of the cellular form, said leg members having reinforcing bars attached thereto.

8. In a cellular form for use in concrete walls or floors, the combination of a diaphragm wall having oppositely disposed convex edges and having a plurality of sockets extending through the same adjacent said convex edges, stringers extending through said sockets transversely to the plane of said diaphragm wall, Side walls mounted on the outer faces of said stringers, and a pair of side stringers, located at opposite ends of the diaphragm wall, interconnecting with the ends of the said side walls for closing the cell space between the same.

9. In a cellular form for use in concrete walls or floors, the combination of a diaphragm wall having oppositely disposed convex edges and having a plurality of sockets extending through the Same adjacent said convex edges, stringers extending through said sockets transversely to the plane of said diaphragm Wall, side walls mounted on the outer faces of said stringers, said diaphragm wall having a notch at each end thereof, and a Stringer plate at each end interlocking with its corresponding notch, and interlocking with the adjacent edges of the side walls to close the cell space between the same.

10. In a cellular form for use in concrete walls or floors, the combination of a diaphragm plate having oppositely disposed convex edges and having a plurality of Stringer sockets extending along said convex edges, a plurality of stringers extending through said sockets and transversely to the plane of the diaphragm plate, side walls mounted on the outer faces of said stringers, said diaphragm plate having extensions at its ends projecting beyond said side Walls, and providing means for the attachment of reinforcing rods to extend longitudinally with said stringers, a Stringer plate extending longitudinally with the first-named stringers, having flanges at its side edges for engaging the adjacent ends of Saidside walls, said flanges having Slots therethrough to permit the said extensions of the diaphragm plate to project through the same. I

1l. In a cellular form for use in concrete Walls or floors, the combination of an elongated diaphragm wall having oppositely disposed side edges with notches cut therein, a plurality of stringers extending transversely to the plane of the diaphragm wall and passing through said notches, side walls supported on the stringers, a side Stringer at each end of vthe diaphragm wall, said side Stringer and said diaphragm Wall having interconnecting means for holding the side Stringer, said side Stringer having grooves in its side edges to receive the inwardly bent ends of the Said side walls, and a bar extending across the side Stringer for positioning the cellular forms and for connecting reinforcing bars extending rigidly to the cellular form.

12. In a cellular form construction for em-V bedment in concrete, a plurality of closed hollow spaced cellular forms having transverse diaphragm walls, a plurality of stringers extending longitudinally of the cells through said diaphragm walls adjacent the outer periphery thereof, and walls for the cells mounted on the outer faces of said stringers, certain of said stringers extending from one closed hollow cellular form across the intervening space into an adjacent closed hollow cellular form and engaging transverse interior diaphragm walls of aligned forms.

13. In a cellular form for use in concrte walls or floors, the combination of an elongated diaphragm wall having oppositely disposed side edges with notches cut therein, a plurality of stringers extending transversely to the plane of the diaphragm wall and passing through Said notches, Side walls for the cell mounted on the outer faces of said stringers, a side Stringer at each end ofthe diaphragm wall, said Side Stringer and said diaphragm wall having interconnecting means for holding the Side Stringer and a bar extending across the outer Side of the Side Stringer for attaching reinforcing bars to extend longitudinally with the stringers, said bar being bent to substantially conform to the end of the diaphragm wall, and having means for engaging the opposite faces of the diaphragm Wall.

14. In a cellular form for use in concrete walls or floors, the combination of an elongated diaphragm wall having oppositely disposed side edges with notches cut therein, a plurality of stringers extending transversely to the plane of the diaphragm wall and passing through Said notches, side walls for the cell mounted on the outer faces of said stringers, a side Stringer at each end of the diaphragm wall closing the ends of the cellular Space formed between said side walls, and having means for engaging the ends of said side walls, a bar extending over and around an end of said diaphragm wall with the outer Side of the same engaging the said side Stringer, Said bar having integral extensions projecting down on the outer side of the Side Stringer.

15. A cellular construction for embedment in concrete constructed as described in claim 2, in which the cell wall is convex and certain of the said plurality of stringers are disposed each in a plane normal to the convex wall.

.16. A cellular form for embedment in concrete construction having a transverse diaphragm, a plurality of stringers passing through the said diaphragm adjacent the outer edges of the diaphragm, and side Walls for the form cornposed of material Wrapped across the outer sides of said stringers and supported thereby.

17. In a cellular form for embedment in concrete, the combination of a diaphragm Wall, a plurality of stringers extending through said diaphragm Wall adjacent the outer edge thereof, side walls for the cell supported on the stringers and extending across the outer faces thereof, and projecting leg members adjacent the ends of the diaphragm wall rigidly connected to and made a part of the cellular form.

18. In a cellular form for embedment in concrete, the combination of a diaphragm wall, a plurality of stringers extending through said diaphragm wall adjacent the outer edge thereof, side Walls for the cell supported on the stringers and extending across the outer faces thereof, and projecting leg members adjacent the ends of the diaphragm Wall rigidly connected to and made a part of the cellular form, said leg members having reinforcing bars fastened thereto.

19. A form construction for embedment in con# crete, having a transverse diaphragm, a plurality of stringers passing through said diaphragm adjacent the edge thereof, and side Walls for the form lmounted on the outer side of the stringers and supported thereby, certain of said stringers having the planes of their sides inclined at an angle to one another and at Varying angles to a vertical plane passing through the longitudinal axis of the form.v

20. In a cellular form for embedment in concrete, the combination of side walls, a diaphragm Wall Within the side walls supporting the same against exterior pressures and acting to maintain said side walls in their given position, and projecting leg members adjacent the diaphragm Wall, to be embedded in the concrete with the form, rigidly connected to the form and constituting a part thereof.

21. In a cellular form for embedment in concrete, the combination of side walls, a diaphragm Wall Within the side walls supporting the same against exterior pressures and acting to maintain said side Walls in their given position, and projecting leg members adjacent the diaphragm Wall, to be embedded in the concrete with the form, rigidly connected to the form and constituting a part thereof, said leg members having reinforcing bars fastened thereto for embedment in the concrete.

HOMER M. HADLEY. 

